Everyone knew Len Dreyer, a handyman for hire in the Park near Niniltna, Alaska, but no one knew anything else about him. Even Kate Shugak hired him to thin the trees on her 160-acre homestead and was planning to ask him to help build a small second cabin on her property for Johnny Morgan, a teenaged boy in her care. But she, the Park's unofficial p.i., seems to have known less about him than a...